Friction-clutch.



J. R. VOORHEES.

FRICTION OLUTGH.

APPLICATION FILED NQV.19, 1912.

Patented Mar. 31, 1914.

:romv 3. voonnnns, or cnmm rants, IOWA.

rmcrron-cnmrcn.

Specification of Letters l'atent. Application filed November 19, 1912. Serial No. 782,276.

Patented Mar. a1, 1914.

To all whom i t map concern Be it known that I, JOHN R. Voonmms, a citizen of the United'States of America,

and a resident of Cedar .Falls, Blackhawk county, Iowa, have invented certain new and useful Im rovements in Friction- Glutches, of whic the following is-a specification.

My invention relates to improvements in friction clutches, and the object of my improvement is to provide for winding drums, hoisting machinery yet effective clutch adapted for manual operation and release.

This object I have accomplished by th'e mechanism which is hereinafter described and claimed, and which 'is illustrated in the accompanying drawings, in which:

Figure 1 is an enlarged detail elevation of my friction clutch, with parts broken away. Fig. 2. isa transverse vertical section of Fig. 1,'taken on the line c-'d thereof, and showing the inwardly-directed face of the clutch (in elevation. Fig. 3 is a detail elevation of the elastic yieldable inner clutch-member.

Similar numeralsof reference denote corresponding parts throughout the several views. 1

My friction-clutch may be incorporated in any species of mechanism whereits use may be necessa convenience of illustration I have shown it associated with the winding-drum of a hoisting machine.

A driven-shaft 1 has a fixedly connected gear-wheel 2 and friction-drum 8 mounted loosely on one end. A sleeve 7 .is loosely slidably mounted upon the shaft 1 and has a coned end. A hub is splined on said shaftland has an integral radial arm 14 provided with oppositely-directed elastic ringparts 18, which latter movably fit the inner wall of the rim 8. The ends of said ringparts are widened, with the adjacent extremities recessed to provide like opposed rectangular seats for a block 13, the latter having its inner end held to prevent removal from its seat by an enlargement of a washer secured thereon. The block has an outwardly-projecting finger 11 which is arched and the like, a simple or prove desirable, but forover the shaft 1, spaced therefrom, and provided with a set-screw 12 working through it inwardly. The outer part of the finger is spaced from the arm 14- and has its extremity recurved to bear movabltyl thereagainst. A cone 7 is slidable on e shaft -1 to pass under the end of the screw 12' to swing or rock the finger and block so that the latter will spread the widened ends of the ring 18 apart to frictionally enga e said rim 8, which causes rotation of the s aft 1. The spacing of the finger permits the cone 7 clearance to work slidmgly under the setscrew 12, while the bearing of the tip of said finger against the arm. 14 prevents a torsion at its junction with said block, with consequent fracture.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is:

In a friction-clutch, a driven-shaft, a friction-rim loosely mounted thereon, a hub fixed on said shaft and having-an arm provided with an integral split friction ring whose arts are elastic and widened at their extremities with the meeting edges of each extremity cutaway to provide like opposed rectangular bearing-seats, a rectangular block seated in said rectangular seat and se cured therein, said block fitting said seat, said block having an integral outwardly di rected finger spaced from said ring and arched over said shaft with its further extremity recurved to movably bear against,

Signed at Waterloo, Iowa, this 31st day of Oct. 1912.

, JOHN B. VOORIEES. Witnesses:

Gno. G. KENNEDY, W. H. Bronx. 

